Adelar Mantovani

Estrutura demográfica e padrão espacial de uma população natural de Araucaria angustifolia (Bertol.) Kuntze (araucariaceae), na Reserva Genética Florestal de Caçador, Estado de Santa Catarina

The Araucaria angustifolia (Bertol.) Kuntze is a Brazilian native species considered threatened. There is a lack of information and data about the species ecology that could be used as the basis for preservation and management measures. Intending to alleviate the this lack of data, this study was carried out based on a natural population of A. angustifolia occurring in the Forest Genetic Reserve of Cacador, located in the Brazilian state of Santa Catarina. The main goal of the present work was to describe the demographic structure of a natural A. angustifolia population. Therefore, the population studied was divided into four classes based on stage and gender: regeneration, juveniles, males and females. The diametric and height structures, sexual ratio, spatial and dependence patterns were evaluated. The results demonstrated that there was a small regeneration ratio and the sexual ratio was around 1:1, as previously expected for the species. In the spatial pattern analysis, aggregation groups appear in all classes studied. The regeneration showed clusters that do not seem to be associated to adult specimens. The natural regeneration occurs, but in low density under forest conditions.

Fine-scale spatial genetic structure and allozymic diversity in natural populations of Ocotea catharinensis Mez. (Lauraceae)

In order to establish a strategy for conservation, the distribution of genetic diversity in four natural populations of Ocotea catharinensis in the Brazilian Atlantic rain forest was investigated using 18 allozyme loci. Estimates of the average number of alleles per loci (2.2), percentage of polymorphic loci (83.3%) and expected genetic diversity (0.427) in adult individuals were high; suggesting that all populations have genetic potential for conservation. The inbreeding within populations (

Bark Harvesting Systems of Drimys brasiliensis Miers in the Brazilian Atlantic Rainforest

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ASPECTOS DA BIOLOGIA REPRODUTIVA DE Drimys brasiliensis Miers (WINTERACEAE) EM FLORESTA OMBRÓFILA MISTA, SUL DO BRASIL

) and the total inbreeding (

Domesticated Landscapes in Araucaria Forests, Southern Brazil: A Multispecies Local Conservation-by-Use System

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Genetic Conservation of Brazilian Pine ( Araucaria angustifolia ) Through Traditional Land Use

) suggest population structure, since a high level of divergence among populations (